CM to Inches Converter

Convert centimeters to inches as you type. Type in either box, or switch to any other length unit.

LiveLengthin = cm ÷ 2.54URL: /cm-to-inches

Convert

Result

Report error

Did we solve your problem today?

About centimeters and inches

Length units appear on building plans, maps, product dimensions, height and distance. The US uses inches, feet, yards and miles day to day; most other countries and all science use metres.

This converter changes centimeters (cm) into inches (in) instantly. You can also type in the second box to convert backwards, or pick any other length unit from the menus.

Formula

in = cm ÷ 2.54 1 cm = 0.393700787 in 1 in = 2.54 cm

Both units are defined in metres: 1 centimeter = 0.01 metre, and 1 inch = 0.0254 metre. Dividing one by the other gives the factor above.

Worked example

To convert 12 cm: 12 × 0.393700787 = 4.724409 in.

Notes and assumptions

Results use exact defined factors and are rounded only for display (up to 6 significant digits, or the decimals you choose).

Popular searches

Number-specific searches can each have their own page that opens this converter pre-filled.

convert cm to inches40 cm to inches100 cm to inches15 cm to inches15cm to inches18 cm to inches90 cm to inches80 cm to inches

Centimeters to inches conversion table

cmin
1 cm0.393701 in
2 cm0.787402 in
3 cm1.181102 in
4 cm1.574803 in
5 cm1.968504 in
6 cm2.362205 in
7 cm2.755906 in
8 cm3.149606 in
9 cm3.543307 in
10 cm3.937008 in
12 cm4.724409 in
15 cm5.905512 in
20 cm7.874016 in
cmin
25 cm9.84252 in
30 cm11.81102 in
40 cm15.74803 in
50 cm19.68504 in
60 cm23.62205 in
70 cm27.55906 in
75 cm29.52756 in
80 cm31.49606 in
90 cm35.43307 in
100 cm39.37008 in
250 cm98.4252 in
500 cm196.8504 in
1,000 cm393.7008 in

How to convert by hand

  1. Take the value in centimeters.
  2. Multiply it by 0.393700787.
  3. Round only at the end.

Common mistakes

  • Rounding the factor too early. 2.54 cm per inch is exact; don’t use 2.5.
  • Writing 5.5 feet as 5 ft 5 in. It’s 5 ft 6 in.

Sources

Frequently asked questions

How many inches are in one centimeter?

1 cm = 0.393701 in.

How do I convert centimeters to inches?

Multiply by 0.393700787 (or divide by 2.54). Example: 10 cm = 3.937008 in.

How do I convert inches back to centimeters?

Divide by 0.393700787. Press the swap button in the converter.

About this tool

Written by
[Author: to be assigned]
Reviewed by
Formula tests passed · human review pending
Last updated
31 Oct 2026

See our methodology and editorial policy. Think something’s off? Report an error with this tool.

Related tools

All Unit Converters
Live

KM to Miles Converter

Convert kilometers to miles instantly, with the formula and a quick reference table.

Length
Live

Miles to Feet Converter

Convert miles to feet instantly, with the formula and a quick reference table.

Length